Java Hex Calculate toHex(final byte[] input)

Description

Converts bytes to hexadecimal characters.

License

Apache License

Parameter

Parameter	Description
input	the bytes to convert. Must be non null .

Return

a hexadecimal representation of input . Never null .

Declaration

public static char[] toHex(final byte[] input) 

Method Source Code

//package com.java2s;
/**//from  w  w w .j  a  v  a2  s . c  o m
 * Copyright 2011 Caleb Richardson
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *   http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

public class Main {
    private final static char[] HEX_ALPHABET = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c',
            'd', 'e', 'f' };

    /**
     * Converts bytes to hexadecimal characters.
     * 
     * @param input the bytes to convert. Must be non {@code null}.
     * @return a hexadecimal representation of {@code input}. Never {@code null}.
     */
    public static char[] toHex(final byte[] input) {
        char[] ret = new char[input.length * 2];

        for (int i = 0; i < input.length; ++i) {
            int b = 0xFF & input[i];
            ret[i * 2] = HEX_ALPHABET[b >> 4];
            ret[i * 2 + 1] = HEX_ALPHABET[0x0F & b];
        }

        return ret;
    }
}

Related

1. toHex(final byte[] data)
2. toHex(final byte[] data)
3. toHex(final byte[] data)
4. toHex(final byte[] data, final int startPos, final int length)
5. toHex(final byte[] data, final String separator)
6. toHex(final byte[] value)
7. toHex(final char a, final int halfbyte)
8. toHex(final char[] dest, int destPos, final byte[] src, final int srcStart, final int srcLength)
9. toHex(final int i)